[Multi-Profiles] Fixed image selection for two users in multi-profile mode.

BUG=313303
TEST=manual tests on Linux ChromeOS build

Review URL: https://codereview.chromium.org/108173004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239841 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239841
Fixes input type change regression caused by polymer uprev.

BUG=321713

Review URL: https://codereview.chromium.org/108563004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239842 0039d316-1c4b-4281-b951-d872f2087c98
Remove the entry for shift+<F4> from the keyboard overlay

BUG=312498
TEST=Manual, see bug

Review URL: https://codereview.chromium.org/110563002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239843 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239842
SVN changes up to revision 239843